Caylin Allise Watson. She's accused of setting her car on fire with her 14-month-old inside on Interstate 126 in Columbia, South Carolina on May 17. (Richland County Sheriff's Department, May 18, 2020)

The son was taken to a burn center in Augusta, Georgia, where he was hospitalized Sunday in critical condition with extensive burns, police said.

Watson was parked on Interstate 126 on Sunday afternoon when she lit the vehicle on fire, police said.

A picture of the car Caylin Allise Watson is accused of setting on fire with her 14-month-old inside on Interstate 126 in Columbia, South Carolina on May 17. (WACH, May 17, 2020)

Four people passing by stopped to help, including some who sought to retrieve the child. Firefighters extinguished the flames, and police said they arrested Watson after finding evidence suggesting the fire was intentionally set.

Advertisement

A picture of the car Caylin Allise Watson is accused of setting on fire with her 14-month-old inside on Interstate 126 in Columbia, South Carolina on May 17. (WACH, May 17, 2020)